Disk sharpener



June 6, 1950 H. PATER 2,510,601

DISK SHARPENER Filed June 8, 1948 2 Sheets-Sheet 1 IN VEN TOR.

Herman Pa Zer 14 TrORIYEKS' June 6, 1950 H. PATER DISK SHARPENER FiledJune 8, 1948 Sheets-Sheet 2 HTTOH/VEYS Patented June 6, 1950 Thisinvention relatesto sharpening apparatus foragricultural" implements,and more particularl'y'to a. device'fonsharpening harrmv'discs;

A main object'ofythejinvention is-toprovide-a:- novel and.improvedapparatus for: sharpeningharrow discs. without requiring thediscs to. be, removed'from' the narrow: said apparatus (being verysimple "in construction; easy to operate; and providingv means forrotating the disc while it" is; being sharpened: r

A further object ofthe invention is to provide an improved harrow discsharpener-which enables thev harrow discs to bep-sharpenedlwithout'dismantling th'eharrow and which is adjustable'so as tosharpenthediscson both sides, the device being inexpensive to manufacture, convenientto handle and being-veryrugged in-construction.

Further objects and advantages of the invention will-become apparentfrom the-following description and claims, andfrom-theaccompanyingdrawings, whereim.

Figured is a side elevationaltview of a ,harrow disc sharpenerconstructed in accordance with .the present invention.

Figure 2..is--is a top plan viewof. the discisharp, enerr of F ure 1showing it in.,relationship to a disc rbeing; sharpened.

Figure 31s: a front end ener of Figure 1.

Figure 4 is a cross-sectional view taken on line 4-4 of Figure 3.

Figure is a cross-sectional detail view taken on line 5-5 of Figure 3.

Referring to the drawings, I I designates a base plate which is providedwith the front supporting legs I2, l2 secured to the forward corners ofthe plate and a rear supporting leg I3 secured to the view, of. thedisc, sharpmidportion of the rear margin of the plate and forming asupport. Plate II is formed with a longitudinal slot 1 4 and overlyingthe plate at said slot is a plate member I5 provided with a dependingstud I6 passing through the slot I4. Mounted on the stud is a washer l1and threaded on said stud is a securing nut I8. Designated at I9 is anythBeIOdSE. 23, ZS at-oneside of base plate *I I are" additionalsleeve=members 2'5, 25: Designated: at:

2fi-is:a platemember which is-supported on sleeve mernb'ers 2'5;25andiisadjustably-clampedthereto hers-255 25? Blate member "26 carries avertical tubularpostf member 219 and-- adjustably secured in said'postmember by a set screw 3 O 'is a post element- 3I Rigidly secured to-"thetoppf post; element 31: eahorizonta-l longitudinalsleevemember -32-inwhichisgiournaleda shaft sfi iformed' 'a-t its rear end'with a crankhandle or *hand": actuable' means 34-. At

itsz-forward eiidi shaft 33 carries 'avrubber friction disc- 351".Aidjustablyusecured-t on sleeve member 322 by: me'answofzrespectivesetscrews s3fiand3] are the coll-an members .38 and? 39 Collar member- 391carriessa radial apertured bracket Rand secured to collars-member;is-.=an offset;- rod 4 I passing through-.bracket-rMkand securedithereinby:a set: screw'4'2z Rotatably. secured-ito-sthe 'end ofrod' 4 I 1opposite friction =disc 315.=.is=aroller disc 4.3;

Inzsharpening a harrowl disc therharrow shaft; shown in dotted View at46 in Figure 2 isele-. vat'ed smthatlthe discs clean the ground: Theshanpenervis then pos'itioned behind'z the disc to bash-arpemed;'asshown in Figure 2 at 44; and the:- friction: :d 'isc 35 and'rol-lerdisc 43 are: engaged with the marginal portion of the nextadjacent disc on the shaft, shown at 45. As the grinding wheel 22abrades the edge of the disc 44, the crank handle 34 is manuallyrotated, causing disc 45 to be rotated by friction disc 35, whichrotates the disc shaft 46 and the disc 44. After the rear side of theedge of disc 44 has been completely ground, the operation is repeatedwith the grinding wheel 22 in engagement with the front side of the discedge, as shown in dotted view in Figure 2. The wheel 22 may be swunginto this position by retracting the motor l9 slightly and employing thehandle 2| to swing motor I9 and the grinding wheel 22 to the abovementioned dotted line position. Slot 44 allows the motor to be retractedfrom its first postion and then tobe returned to the second angledposition thereof wherein grinding Wheel 22 engages the front side of thedisc edge. The position of the grinding wheel may be controlled at alltimes by means of the handle 2| whereas the rate of rotation of the discbeing ground may be controlled by handle 34. 7

When the sharpening operation has been completed on the first disc, theprocedure may be repeated on the succeeding discs.

While a specific embodiment of an apparatus for sharpening harrow discshas been disclosed in the foregoing description, it will be understoodthat various modifications within the spirit of the invention may occurto those skilled in the art. Therefore, it is intended that nolimitations be .placed on the invention except as defined by the scopeof the appended claims.

What is claimed is:

1. In a sharpening device a support, a horizontally disposed platemember positioned upon said support and mounted thereon for slidingmovement longitudinally thereof and for rotatable movement about avertical axis, a motor superimposed upon said plate member and fixedlysecured thereto, a drive shaft carried by said motor, a grinding wheelon said drive shaftadapted to engage an edge of one of a plurality ofspaced harrow discs carried by a harrow disc shaft when the latter ispositioned in transverse spaced relation with respect to said support, asecond horizontallydisposed plate member arranged in spaced parallelrelation with respect to said first plate member and fixedly supportedon said support, a vertically disposed tubular post member carried bysaid second plate member, a post element mounted within said post memberand secured to the latter, a second horizontally disposed shaftextending longitudinally of said support and rotatably supported on saidpost element, a friction disc carried by one end of said second shaftand adapted to frictionally engage-the adjacent face edge of the nextsucceeding one of said harrow discs, a rod arranged in parallel spacedrelation with respect to said second shaft and having one end fixedlysecured to said post element, a roller disc carried by the other end ofsaid rod and adapted to engage the opposite adjacent face edge of saidnext succeeding disc of said harrow discs, and hand actuable means onthe other end of said second shaft for effecting rotation of the latterwhereby rotation of said second shaft causes rotation of said harrowshaft and consequent rotation of said one of said harrow discs inengagement with said grinding wheel.

2. In a sharpening devi-oea support, a horizontally disposed platemember positioned upon said support and mounted thereon for sliding ablemovement about a vertical axis, a motor superimposed upon said platemember and fixedly secured thereto, a drive shaft carried by said motor,a grinding wheel on said drive shaft adapted to engage an edge of one ofa plurality of spaced harrow discs carried by a harrow disc shaft whenthe latter is positioned in transverse spaced relation with respect tosaid support, a second horizontally disposed plate member arranged inspaced parallel relation with respect to said first plate member andfixedly supported on said support, a vertically disposed tubular postmember carried by said second plate member,.a post element mountedwithin said post member and secured to the latter, a horizontallydisposed sleeve member extending longitudinally of said movementlongitudinally thereof and for rotatsupport and fixedly secured to thetop of said post element, a second shaft rotatably supported in saidsleeve member, a friction disc carried by one end of said second shaftand adapted to frictionally engage the adjacent face edge of the nextsucceeding one of said harrow discsfa rod arranged in parallel spacedrelation with respect to said second shaft and having one end fixedlysecured to said sleeve member, a roller disc carried by the other end ofsaid rod and adapted to engage the opposite adjacent face edge of saidnext succeeding disc of said harrow discs, and hand actuable means onthe other end of said second shaft for effecting rotation of the latterwhereby rotation of said second shaft causes rotation of said harrow.shaft and consequent rotation of said one of said harrow discs inengagement with said grinding wheel.

' HERMAN PATER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 646,093 Leshure Mar. 27, 19001,085,840 Apgar Feb. 3, 1914 2,106,082 Carlson Jan. 18, 1938 2,244,586Venable June 3, 1941 2,477,361 Browne July 26, 1949 2,487,709 HodgesNov. 8, 1949

